18.____________we receive your application, we'll send you an e-mail to confirm it.
A)Once
B)Whatever
C)Whether
D)However
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19. Make a list of what you have to do and put the items____________order of importance.
A)on
B) in
C)for
D) about
20. When you have filled in the form, keep the top part and send_________part to the bank.
A) others
B) other
C) the other
D) the others
21. All our spare parts are guaranteed if you have your car______with us each year.
A)serviced
B) be servicing
C) to service
D)servicing
22. We are confident that we_________our export sales by 15 percent by the end of this year.
A)increase
B) had increased
C) would increase
D) will have increased